Test Your Peptide For Free

Send us your peptide sample and get an independent HPLC lab test — identity, purity, and fill weight. No cost. Optional paid add-ons available.

HPLC + LC-MS 5-7 day results 100% confidential
Get My Free Test

Thymosin Alpha-1

Imunomodulador — melhora a função das células T e combate infecções

4.0
24 avaliações
Rate This Peptide

Rating Breakdown

Immune System Support
4.8
Safety & Side Effects
4.1
Mitochondrial Function
3.9
Oxidative Stress Reduction
3.9
Aging Biomarker Improvement
3.7
Telomere & Cellular Aging
3.4
Cardioprotective Effect
3.3

Visão Geral

Thymosin Alpha-1 é um peptídeo de ocorrência natural que potencializa a função imunológica ao promover a maturação e a ativação das células T.

Key Information

Identity
Also Known As Zadaxin; T-alpha-1
Sequence Ac-Ser-Asp-Ala-Ala-Val-Asp-Thr-Ser-Ser-Glu-Ile-Thr-Thr-Lys-Asp-Leu-Lys-Glu-Lys-Lys-Glu-Val-Val-Glu-Glu-Ala-Glu-Asn-OH
CAS Number 109355-65-5
Molecular Formula C138H227N35O45
Properties
Half-Life Short (hours)
Administration subcutaneous injection
Dosage Range 1.6 mg, 2x weekly
Price Range $1.0–$8.0/mg
Handling & Storage
Storage Lyophilized: -20C; Reconstituted: 2-8C
Reconstitution Reconstitute with bacteriostatic water
Regulatory Status
US Status Approved in 35+ countries (Zadaxin)
Research Papers 5 indexed

Mecanismo

Estimula a maturação das células T, aprimora a função das células dendríticas e modula a produção de citocinas.

Benefits

  • Melhora a função das células T
  • Combate infecções virais
  • Adjuvante de vacinas
  • Aprovado em mais de 35 países

Side Effects

  • Relatos mínimos
  • Reações leves no local da injeção

Contraindications

  • N
  • o
  • n
  • e
  • e
  • s
  • t
  • a
  • b
  • l
  • i
  • s
  • h
  • e
  • d

Evidence Summary

Aprovado em mais de 35 países para hepatite C e B. Estudos mostram eficácia contra infecções virais.

Research

Aprovado pela FDA em alguns países para hepatite C e B. Estudos demonstram eficácia contra infecções virais e como adjuvante de vacinas.

Ver Investigación

Safety

Bem tolerado. Aprovado pela FDA em mais de 35 países.

Frequently Asked Questions About Thymosin Alpha-1

What is Thymosin Alpha-1?

Thymosin Alpha-1 is a research peptide also known as Zadaxin; T-alpha-1. Imunomodulador — melhora a função das células T e combate infecções It is studied for its potential therapeutic applications and is available from various research chemical vendors.

How does Thymosin Alpha-1 work?

Estimula a maturação das células T, aprimora a função das células dendríticas e modula a produção de citocinas.

What is the recommended dosage for Thymosin Alpha-1?

The commonly studied dosage range for Thymosin Alpha-1 is 1.6 mg, 2x weekly. Dosage protocols vary based on research objectives. Always consult published studies and start with conservative amounts. Thymosin Alpha-1 should only be used in controlled research settings.

Where can I buy Thymosin Alpha-1?

PepsReview indexes Thymosin Alpha-1 pricing from multiple vendors. Check the Vendors tab above for a price comparison table showing cost per milligram, purity, COA status, and stock availability. Vendor reviews from real users are available on each vendor's profile page.

Is Thymosin Alpha-1 legal?

US regulatory status: Approved in 35+ countries (Zadaxin). The legal status of Thymosin Alpha-1 varies by jurisdiction. In most countries, it is sold as a research chemical, not for human consumption. Always verify the legal status in your country before purchasing.

What are the side effects of Thymosin Alpha-1?

Reported side effects include: Relatos mínimos, Reações leves no local da injeção. Always review safety data and published studies before use.

Key Research Papers on Thymosin Alpha-1

The following peer-reviewed studies and clinical trials are indexed in our research library for Thymosin Alpha-1. Each paper links to a detailed summary with key findings, study design, and publication metadata.

Related Anti-aging / Longevity Peptides

Other peptides in the anti-aging / longevity category that may be of interest for comparative research:

Vendor Price Comparison

Producto Vendedor Tamaño Precio $/mg Pureza COA Stock Visitar
Thymosin Alpha-1 10mg 10.0mg $80.00 $8.00 99%+ Janoshik (7d) In Stock Visitar

Pesquisa

5 artículos de investigación indexados

Ver Investigación

Write a Review

Rating Breakdown

Safety
4.1
Overall
4.0
Value
3.9
Effectiveness
3.8

Based on 24 avaliações.

Avaliações

Fifth cycle and skin keeps slowly improving 2026-10-08
Kristy D. Verified Reviewer

34F paramedic here. I run thymosin alpha-1 in 8-week cycles with 3 weeks off because I stall around week 7-8. Currently on my 5th cycle. Dose is 1.6 mg subQ twice weekly. First few cycles were subtle, but now my skin looks calmer: redness down maybe 30%, pores less obvious, and two rough patches on my cheeks have smoothed out. I still get a red welt at the injection site for a day and feel a bit tired the morning after dosing. As a paramedic I used to get 3-4 colds a year; last winter only 1. Effects seem to build slowly, not dramatic.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Surprised by skin and healing benefits 2026-10-04
Alicia D. Verified Reviewer

I’m 38, work as a graphic designer, and started TA-1 at 1.6 mg subcutaneously twice a week for about 10 weeks. I wasn’t running a cycle—just wanted immune and recovery support. My heels used to crack every winter; now they’re smooth, maybe 80% better. I had a few grey hairs at my part, and they seem less noticeable, not gone but reduced. Skin tone looks more even, less dull. A kitchen burn healed in about 6 days instead of the usual 10–12. Only side effect was mild redness at injection sites for the first week. No fatigue or flu-like feelings.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Solid immune support, but pricey 2026-09-12
Victor D. Verified Reviewer

I'm 43, lab tech, started thymosin alpha-1 at 1.6 mg subQ twice weekly for 8 weeks. First two weeks had mild redness at injection sites and a bit of fatigue, nothing that stopped me. By week 4 my usual winter cold never turned into bronchitis, and my resting HR dropped from 72 to 66. CRP went from 3.1 to 1.8 mg/L. I still get seasonal allergies, but less chest tightness. Sleep improved maybe 30 min. Not a miracle, but I renewed for another 8 weeks. Cost is high, so 4.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Thymosin alpha-1 kept me working through cold season 2026-09-09
Lena N. Verified Reviewer

I’m 52, work 12-hour ambulance shifts. Ran thymosin alpha-1 at 1.6 mg subQ twice a week for 12 weeks. Didn’t expect magic, but my sick days dropped from 3 last winter to none this spring. When my partner caught a bad cold, I got a scratchy throat for a day and that was it. Energy after night shifts is steadier, not wired, just less wiped. Injection sites occasionally got a small red bump and headache twice. I’ll keep it in rotation, maybe cycle off for a month. Not cheap, but worth it if you’re around sick people constantly.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Sticking with it — slow skin gains that add up 2026-09-08
Marco N. Verified Reviewer

I'm 41, a graphic designer, so I stare at screens and my skin shows it. I've done 5 rounds of thymosin alpha-1, 1.6 mg subQ twice a week, 8 weeks on then 3 weeks off. Around week 8 I hit a plateau, so the break helps. First couple cycles were subtle. Now I'd say redness is down maybe 20%, pores look tighter, and fine lines around my eyes are less harsh. No dramatic overnight thing, just gradual. Side effects: small red bump at injection site for a day, occasional mild headache. Sleep seems a bit better too. Still expensive, but I'll keep going.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Solid immune and energy boost at 5mg daily 2026-09-06
Camille D. Verified Reviewer

I've been using thymosin alpha-1 for about 6 weeks now, 5mg daily split into 2.5mg morning and night. Started because my energy was tanking after long sprint cycles. Around week 3 my sleep score went from 68 to 82, and I stopped needing a 3pm coffee. Colds? None this quarter, though that could be luck. No injection site issues except mild redness a couple times. I tried 7.5mg one day and felt a bit wired, so stayed at 5. Higher might work better for some people, but obviously not medical advice lol. Worth it for me.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Six weeks on thymosin alpha-1 for elbow pain 2026-09-01
Greg D. Verified Reviewer

47-year-old stay-at-home dad here. I started thymosin alpha-1 for chronic golfer’s elbow that’s bugged me since hauling kids and groceries. I do 1.6 mg subQ twice a week, sometimes split to 0.8 mg if I feel run down. Six weeks in. Pain dropped from 7/10 to about 5/10, grip feels maybe 15% better. No redness or lumps, just mild fatigue the day after pinning. Not a miracle. I’m planning 8 weeks on, 4 off, then another 8. Curious if that helps tendons more.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Subtle but real changes after 10 weeks 2026-08-28
Alicia D. Verified Reviewer

38, graphic designer, not on any cycle. I ran thymosin alpha-1 at 1.6 mg subQ twice a week for 10 weeks. My cracked heels are basically gone—used to be 4/10 roughness, now maybe 1/10. I had a few grey hairs at my part; now I count fewer, maybe 15% less. Skin looks more even and fresher, less redness around my nose. A kitchen nick healed in 2 days instead of 5. Side effects: mild red bump at injection site and a little tired after dosing for first week. No major issues. Pricey, but I'll likely do another round.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Thymosin Alpha-1: no obvious changes, but I’m still on it 2026-08-23
Drew D. Verified Reviewer

I’m 43, a personal trainer, and I’ve logged 142 shots of thymosin alpha-1 at 5 mg, mostly in my thighs. My tracker doesn’t lie. Energy in sessions is unchanged, recovery is unchanged, and no feedback from anyone, good or bad. Each injection gives a quick hornet-like sting, and I’ve got a dark bruise on both thighs that just hangs around. I’ll keep going since time keeps moving, and I’d rather stay ahead of things. Not a miracle, not a disaster.

Eficacia: 3/5 Seguridad: 4/5 Valor: 3/5
Thymosin alpha-1 after 3 months: gradual but noticeable 2026-08-18
Dana N. Verified Reviewer

I'm a 50-year-old dev, started thymosin alpha-1 on May 9 at 2 mg subQ, usually 5 days on/2 off. Three months in. No dramatic overnight stuff. Skin tone is more even, complexion brighter, small cuts and blemishes heal faster—maybe 2-3 days quicker. Hair has more shine and feels less dry. I look a bit more refreshed in recent photos vs March. Only side effect was a mild injection-site sting a few times. I'll take a short break soon, but I'm happy with the results.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Solid immune support, but the hype guy is exhausting 2026-08-15
Boris N. Verified Reviewer

52, software dev. Ran thymosin alpha-1 at 1.6 mg twice a week for 12 weeks. First month nothing obvious, then I noticed fewer colds—usually I get 4-5 bugs each winter, this time only 1 mild one. Energy steadier, sleep a bit deeper. Side effects: mild redness at injection site and one headache after the first few pins. Considering a second round at 3.2 mg weekly or same dose for another 3 months; Dr. Jones said he bumped it up for about 3 months, so maybe. But his endless sales pitch makes me want to block his content. Rating 4/5.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Thymosin Alpha-1: steady skin gains over 5 cycles 2026-08-12
Stacey D. Verified Reviewer

I’m a 31-year-old PT and I’ve done five rounds of thymosin alpha-1: 1.6 mg subQ twice weekly for 8 weeks, then 3 weeks off. Around week 7 the progress tends to flatline, so the break seems to reset things for me. Skin is the clearest change: breakouts down maybe 30%, and two forehead lines look about 15% softer. It builds each cycle. I’ve also had fewer colds this winter—two instead of my usual four. Side effects are mild: injection site redness for a day, sometimes a dull headache after the first shot. Good but pricey.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Thymosin Alpha-1 after 12 weeks: steadier immune response 2026-08-05
Rob D. Verified Reviewer

I’m a 50-year-old paramedic and started Thymosin Alpha-1 on May 9. Dose: 1.6 mg subQ twice weekly for about 3 months. The changes were gradual. I used to catch 3-4 bugs a winter; this spring I had one mild cold that cleared in 3 days instead of dragging 10+. My energy between shifts feels more even, and a small scrape on my hand healed cleanly in about 5 days. Side effects: mild redness at injection sites for the first 2 weeks and one tired evening after doses. I’ll take a short break soon. Not dramatic, but I’m pleased.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Worked for my shoulder and tennis elbow 2026-07-27
Kevin D. Verified Reviewer

36yo software dev here. Had chronic right shoulder pain and left tennis elbow. Ran TA1 for 8 weeks, subq only. Started 3mg daily, bumped to 5mg the last two weeks. Also did rehab: dead hangs, resistance bands, light dumbbells max 25lb high reps. Right shoulder pain vanished, hand numbness gone, tennis elbow gone. No real side effects except occasional mild redness at injection site. Cycling off now, hope it sticks. Worth trying if you combine with rehab exercises.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Subtle but real recovery and skin changes 2026-07-26
Wade N. Verified Reviewer

34 y/o grad student, not cycling. Ran 1.6 mg subQ twice weekly for 10 weeks. Around week 3 my cracked heels got noticeably smoother, maybe 70% better. Skin tone looks more even and less tired; I’ve also noticed fewer new grey hairs at my temples, though not dramatic. A kitchen cut that usually takes 6 days closed up in 3. No real side effects, just mild redness at injection site for first 2 pins. Energy didn’t feel like a stimulant, more steady. Price is steep, but I’ll likely run it again during dissertation stress.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Thymosin Alpha-1 helped my chronic viral issues 2026-07-21
Hannah H. Top Reviewer

So I'm 34 and code all day, and I've been dealing with chronic viral stuff for a while. Tried thymosin alpha-1, honestly wasn't expecting much tbh. After about 2 months my immune markers improved a lot, like my doc was actually surprised. Not gonna lie, the vaccine adjuvant angle is pretty interesting to me, imo. Also it's approved in a bunch of countries which does give me some peace of mind. I didn't really get any bad side effects. If you're researching it, thats my experience.

Eficacia: 2/5 Seguridad: 5/5 Valor: 4/5
Six weeks on Thymosin Alpha-1 as a trucker 2026-07-16
Brandon D. Verified Reviewer

31, regional truck driver. Ran Thymosin Alpha-1 for 6 weeks at 1.6 mg subQ twice weekly. Also pinned BPC/TB near my elbow, but this is just TA1. Colds went from 2 in 3 months to zero, so immune side seems real. Elbow tendinopathy barely moved, maybe 10% better. Sleep improved by about an hour. No flu-like feeling, just a small red bump for a day after shots, 2/10. Energy same. Plan: finish 8 weeks, 4 off, then another 8. Underwhelming for tendons, decent for staying healthy. Not cheap.

Eficacia: 4/5 Seguridad: 5/5 Valor: 3/5
Fifth cycle and my skin keeps improving 2026-07-14
Kristy D. Verified Reviewer

I'm a 34-year-old paramedic and I've been running TA-1 at 1.6 mg subQ twice a week: 8 weeks on, 3 weeks off. Around week 6 I hit a plateau, so the break helps reset that. I'm on my 5th cycle now. Skin texture is maybe 30% smoother, old chin scar is less angry, and hormonal breakouts dropped from 3-4 a month to 1. I still get a red bump at injection sites for a day and sometimes feel a bit tired the next morning. No major issues. It's slow but cumulative.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Good immune help, annoying sales pitch 2026-07-11
Tanisha D. Verified Reviewer

I’m 55, a paramedic, so I’m around sick people constantly. Ran thymosin alpha-1 at 1.6 mg subQ twice weekly for 10 weeks. Usually I get 3-4 bad colds a year; this winter only one mild one. Injection site redness for a day, a little tired the first week. Energy was decent, nothing dramatic. Next round I might bump to three times weekly for 3 months, since that doctor said he did that. But his constant sales pitch is exhausting—I’m close to blocking his videos. Not sure it helps telomeres, but my immune system felt steadier.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
142 shots in, not much to report 2026-07-10
Tanya N. Verified Reviewer

I'm 31 and work as a graphic designer. I've logged 142 shots of thymosin alpha-1, 5 mg each, over about 10 months. I inject my thigh, and it gives that bee-sting burn every time. Both thighs now have a faint bruise that never really goes away. Results? Honestly, nothing obvious. No one has told me I look better or worse. My sleep and energy seem the same, and I caught one cold this winter like usual. I'll keep going anyway. I'm not getting any younger, and I don't want to stop something that might be helping quietly.

Eficacia: 3/5 Seguridad: 4/5 Valor: 4/5
Fewer colds and calmer skin, but not cheap 2026-07-05
Elena S. Verified Reviewer

I'm a 32-year-old cosmetologist and started Thymosin-Alpha-1 (1.6 mg subQ, twice weekly) for 3 months. My main goal was fewer sick days and maybe clearer skin. I used to catch 4-5 colds yearly; in 6 months since starting, I've had one mild one. My clients even commented my rosacea looked calmer. Side effects: slight redness at injection sites and a bit tired the first week. No major issues. It's not cheap, but I renewed for another 3 months. Worth trying if you can afford it.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Thymosin Alpha-1: 12-week immune log from a nurse 2026-06-30
Dmitri D. Verified Reviewer

I'm a 45-year-old nurse and started thymosin alpha-1 on Feb 3, 1.6 mg subq twice weekly for 12 weeks. I didn't expect magic. Around week 4 I noticed fewer sore throats after shifts; I usually get 2-3 colds each winter, and this time I had zero. My energy held steadier through night rotations, and a small scratch healed in about 4 days instead of a week. Injection sites had mild redness for the first two pins, nothing since. Bloodwork showed my lymphocyte count moved from low-normal to mid-normal. Benefits were gradual, not overnight. I'm taking 3 weeks off now, but I'd run it again next flu season.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Subtle but noticeable changes after 10 weeks 2026-06-29
Marisol D. Verified Reviewer

I’m 34, work as an accountant, and I’m not on any cycle. I used thymosin-alpha-1 at 1.6 mg subcutaneously twice a week for about 10 weeks. By week 3 my cracked heels were much smoother, and by week 6 my skin looked more even and fresh. I only had a few grey hairs before, but new ones slowed down. A kitchen paper cut that usually takes 5 days closed in 2. I also skipped my usual two winter colds. Side effects were mild injection-site redness early on and one light headache. Not dramatic, but steady.

Eficacia: 4/5 Seguridad: 4/5 Valor: 4/5
Thymosin alpha-1 paperwork was fine 2026-06-26
Hannah H. Top Reviewer

I'm 34 and work as a chef, so my schedule is all over the place. I got thymosin-alpha-1 as lab reference material, first time trying this one. It came in a few days and the batch COA was included. I had some documentation questions and support answered pretty quick, even said which outside lab ran the analysis. Tbh I'm only logging the paperwork and service side here. No dose, no duration, no results, no side effects, because I didn't use it for that. Imo it's not a recommendation, just what happened. Not gonna lie, the run-on days make me appreciate fast answers.

Eficacia: 2/5 Seguridad: 5/5 Valor: 4/5